Like WannaCry, EternalRocks is part of an arsenal of spy tools developed by the National Security Agency. The malware uses seven NSA-created tools to move from one computer to another through Windows - EnternalBlue, EternalChampion, EternalRomance, EternalSynergy, SMBTouch, ArchiTouch and DoublePulsar.

Hospitals, corporations and government offices around the world were impacted by WannaCry, which seized control of computers and demanded payments from victims.

"As a worm, EternalRocks is far less dangerous than WannaCry's worm component, as it currently does not deliver any malicious content," BleepingComputer explains. "This, however, does not mean that EternalRocks is less complex...for starters, EternalRocks is far more sneaky than WannaCry's SMB worm component. Once it infects a victim, the worm uses a two-stage installation process, with a delayed second stage."

Currently, EternalRocks doesn't corrupt files or deliver any malevolent content. But it can be "weaponized in an instant," BleepingComputer warns.

"Because of its broader exploit arsenal, the lack of a kill switch domain, and because of its initial dormancy, EternalRocks could pose a serious threat to computers with vulnerable SMB (Server Message Block) ports exposed to the Internet, if its author would ever decide to weaponize the worm with ransomware, a banking trojan, RAT (remote access Trojan), or anything else," the site says.

Threats from cybercrime is a growing phenomenon. A report from Cybersecurity Ventures predicts that overall financial losses from online crime will reach more than $6 trillion annually in three years. In 2015, it was just $3 trillion.